N - arylsulfonyl urea derivatives of nitrogen containing heterocyclics



United States Patent 16,386/64; Dec. 9, 1965, 17,095/65, 17,096/65 Int. Cl. C07d 41/06 U.S. Cl. 260-2393 Claims ABSTRACT OF THE DISCLOSURE N-arylsulfonyl urea derivatives of 5 to :8 membered saturated lactams are hypoglycemic agents.

CROSS-REFERENCE This is a continuation-in-part of copending application Ser. Nos. 512,776 and 596,770 filed Dec. 9, 196 5, and Nov. .25, 1966, respectively, and both now abandoned.

DETAILED DESCRIPTION This invention relates to a method of producing a hypoglycemic effect in animals through administration thereto of a compound of the formula:

wherein R} is hydrogen, methyl, chloro or fluoro;

R is hydrogen or lower alkyl, and

x has a value of from 2 to 5, or a pharmaceutically acceptable salt thereof with a base.

The present invention also pertains to pharmaceutical compositions adapted for administration of these compounds in dosage unit form so as to provide a dosage regimen for the animal of a hypoglycemically effective amount of the therapeutic agent.

It will be apparent from the above formula that the compounds utilized in the herein described methods and compositions are ureas, one nitrogen atom of which bears on unsubstituted phenylsulfonyl group or a phenylsulfonyl group substituted in the para position by a methyl, chloro or fluoro group, while the second nitrogen atom constitutes a ring member of a four to eight ring membered lactam, thus including 2-oxo-pyrrolidine, 2-oxo-piperidine, 2-oxo-hexahydroazepine and 2-oxo-hexahydroazocine. In addition this heterocyclic ring may be optionally substituted by lower alkyl group in the 4- or S-position or, where applicable, in the 6- or 7-positions. This lower alkyl group may have from one to six carbon atoms, including, for example, methyl, ethyl, n-propyl, isopropyl, butyl, secbutyl, t-butyl, pentyl, hexyl and the like.

The present invention also pertains to such hypoglycemically effective agents, namely to compounds of the formula exam) ice wherein R is hydrogen, chloro or fluoro;

R is hydrogen or lower alkyl, and

x has a value of from 3 to 5,

and the pharmaceutically acceptable salt thereof with a base.

Pharmaceutically acceptable salts include those derived from inorganic bases such as ammonia and the alkali and alkaline earth metals, e.g., sodium, potassium, magnesium and calcium and those derived from organic amines such as ethylamine, triethylamine, diethylaminoethanol, ethylenediarnine, benzylamine, pyrrolidine, piperidine, morpholine, N-ethylpiperidine, 1-(2-hydroxyethyl) piperidine, and the like. Also embraced are salts with those bases which themselves possess hypoglycemic action such as N -dimethylbiguanide, N -butylbiguanide and N -(Z- phenylethyl)biguanide. Pharmaceutically acceptable salts are produced by allowing the above sulfonylureas to react with a molar equivalent, or excess thereover, of the base in a suitable solvent such as methanol, ethanol, diethyl ether, chloroform, methylene chloride or the like.

The compounds of the present invention can be produced by the reaction of an isocyanate of the formula wherein R is hydrogen, methyl, chloro or fluoro, with a lactam of the formula:

wherein R is hydrogen or lower alkyl and x has a value of from 2, to 5.

The reaction is conducted at room temperature or at slightly elevated temperatures, optionally in an inert organic solvent such as benzene, toluene, xylene, diethylether, dioxane, tetrahydrofuran, methylene chloride, and the like. High temperatures and/ or long reaction periods should, however, generally be avoided. The product is readily collected by conventional techniques such as filtration.

The sulfonylureas of the present invention, and the salts thereof, are preferably administered orally in a daily dosage of from 0.7 to 300 mg./kg. of body weight. The dosage must necessarily be adjusted to age, size and condition of the particular animal being treated.

For this purpose, the utilization of dosage unit forms is especially advantageous. Such forms include for example, tablets, capsules, dragees, powders, syrups, elixirs, and the like. Particularly useful are solid dosage units, i.e., capsules, tablets and dragees.

These solid dosage forms are produced by conventional techniques such as combining the active substance with a pharmaceutical carrier. Such carriers include solid pulverulent carriers such as lactose, saccharose, sorbitol, mannitol, starches such as potato starch, maize starch, amylopectin, cellulose derivatives, gelatin and the like. Optionally, lubricants such as magnesium or calcium stearate or polyethylene glycols (carbowaxes) of suitable molecular weight can be added in the preparation of tablets or dragee cores. The latter are coated, with for example, concentrated sugar solutions which can also contain gum arabic 'and/ or titanium dioxide, or with a lacquer dissolved in volatile organic solvents or mixtures of solvents. Dyestuffs can be added to these coatings, to distinguish between dosages of active substance.

The following examples will serve to further typify the nature of the present invention but should not be con- 3 strued as a limitation thereof. Temperature is given in degrees centigrade.

EXAMPLE 1 Hexahydro-azepin-2-one (11.3 g.) is dissolved in 40 ml. of toluene and 18.3 g. of phenylsulfonylisocyanate are added to the solution. The reaction product crystallises. It is collected by filtration under suction and recrystallised from ethanol, heating at high temperatures being avoided. The pure N phenylsulfonyl 2-oxo-hexahydro-azepine-1- carboxamide obtained melts at 107-108.5.

EXAMPLE 2 In a similar fashion to that described in Example 1, the following compounds are allowed to react with 21.7 g. of p-chlorophenylsultonylisocyanate.

(a) 9.9 g. of 2-piperidone (b) 11.3 g. of hexahydro-azepin-2-one (c) 12.7 g. of hexahydro-azocin-Z-one (d) 12.7 g. of S-methyl-hexahydro-azepin-2-one (e) 17.1 g. of -t-butyl-hexahydro-azepin-2-one There are thus respectively obtained the following compounds:

(a) N-(p-chlorophenylsulfonyl)-2-oxo-piperidine-1- carboxamide, M.P. 138140 (ethanol) (b) N-(p-chlorophenylsulfonyl)-2-oxo-hexahydroazepin-l-carboxamide, M.P. 120.2121.7 (ethanol) (c) N-(p-chlorophenylsulfonyl)-2-oxo-hexahydroazocine-l-carboxamide, M.P. 116-118 (methanol) (d) N- (p-chlorophenylsulfonyl -2-oxo-5-methyl-hexahydroazepine-l-carboxamide, M.P. 112.5114 (methanol) (e) N-(p-chlorophenylsulfonyl)-2-oxo-5-t-butyl-hexahydroazepine-l-carboxamide, M.P. 153154 (dec.) (methanol).

EMMPLE 3 To a solution of 9.9 g. of Z-piperidone in ml. of abs. toluene is added 19.7 g. of p-tolylsulfonylisocyanate. The reaction solution becomes Warm. It is cooled to and upon standing the reaction product crystallizes out. Recrystallization from methanol yields pure N-(p-tolylsulfonyl) 2 oxo-piperidine-l-carboxamide, M.P. 106- 107.

EXAMPLE 4 19.7 g. of p-tolylsulfonylisocyanate are added to 12.7 g. of 5-methylhexahydro-azepine-Z-one in 40 ml. of abs. toluene. The reaction product crystallizes out of the solution. It is collected by filtration under suction and recrystallized from methanol to yield N-(p-tolylsulfonyl)- 2 oxo S-methylhexahydroazepine-l-carboxamide, M.P. 1l5116.

EXAMPLE 5 In a similar fashion to that described in Example 3, the following compounds are allowed to react with 19.7 g. of p-tolylsnlfonylisocyanate.

(a) 9.9 g. of 4-methyl-2-pyrrolidinone (b) 11.3 g. of hexahydro-azepin-Z-one (c) 17.1 g. of 5-t-butyl-hexahydro-azepin-Z-one.

There are thus respectively obtained the following compounds:

(a) N-(p-tolylsulfonyl)-2-oxo-4-methyl-pyrrolidine-lcarboxamide, M.P. 134-135 (methanol) (b) N-(p-tolylsulfonyl)-2-oXo-hexahydro-azepine-1- carboxamide, M.P. 124125.5 (ethanol) (0) N-(p-tolylsulfonyl)-2-oxo-5-t-butyl-hexahydroazepine-l-carboxamide, M.P. 147-149 (dec.) (ethanol).

EXAMPLE 6 By allowing 20.1 g. of p fluorophenylsulfonylisocyanate and 11.3 g. of hexahydro-azepine-Z-one to react in the manner of Example 1 there is obtained N-(p-fluoro- 4 phenylsulfonyl) 2 oxo hexahydro-azepine-l-carboxamide, M.P. 115l 17 (methanol).

EXAMPLE 7 Thirty-one g. of N (p-tolylsulfonyl)-2-oxo-hexahydroazepine-l-carboxamide are stirred in 100 ml. of 2 N sodium hydroxide solution. The substance dissolves in a short time and the sodium salt then crystallizes. The salt is collected by filtration and recrystallized from alcohol, M.P. 249250 after drying.

EXAMPLE 8 One kilogram of N (p chlorophenylsulfonyl)-2-oxohexahydro-azepine-l-carboxamide are mixed with 500 g. of lactose and 270 g. of potato starch. The mixture is moistened with an aqueous solution of 8.0 g. of gelatin and granulated through a sieve. After drying, 60.0 g. of potato starch, 60.0 g. of talcum, 10.0 g. of magnesium stearate and 20.0 g. of colloidal silicon dioxide are added and mixed and the mixture is pressed into 10,000 tablets, each weighing 200 mg. and containing mg. of active substance. If desired, the tablets can be grooved for better adaptation of the dosage.

EXAMPLE 9 A granulate is prepared from 1000 g. of N-(p-chlorophenylsulfonyl) oxo-hexahydro-azepine-l-carboxamide, 345 g. of lactose and the aqueous solution of 6.0 g. of gelatin. After drying, 10.0 g. of colloidal silicon dioxide, 40.0 g. of talcum, 40.0 g. of potato starch and 5.0 g. of magnesium stearate are added and mixed and the mixture is pressed into 10,000 dragee cores. These are then coated with a concentrated syrup of 533 g. of crystallised saccharose, 20.0 g. of shellac, 75.0 g. of gum arabic, 250 g. of talcum, 20 g. of colloidal silicon dioxide and 1.5 g. of dyestuff and dried. The dragees obtained each weight 240 mg. and contain 100 mg. of the active substance.

EXAMPLE 10 Two hundred milligrams of N-(p-tolysulfonyl)-2-oxo- 4-methyl-pyrr0lidine-1-carboxamide are introduced into a two-piece hard gelatine No. 1 capsule.

EXAMPLE 11 One hundred milligrams of N-(p-tolysulfonyl)-2-oxo- S-tert.-butyl-hexahydroazepine-l-carboxamide are introduced into a two-piece hard gelatine N0. 1 capsule.

What is claimed is:

1. A compound of the formula wherein R is hydrogen, chloro or fluoro; R is hydrogen or lower alkyl; and x has a value of from 3 to 5.

2. A pharmaceutically acceptable salt of a compound according to claim 1 with a base.

3. A compound according to claim 1 wherein R is hydrogen and x has a value of 3 or 4.

4. The compound according to claim 1 which is N- 9. The compound according to claim 1 which is N-(p- 3,352,884 11/1967 Fonken et a1. fluoro-phenylsulfony1)- 2 -oxo-hexahydro-azepine- 1 -ca1'- 3,372,164 3/ 1968 Haack et a1. boxamide.

10. The compound according to claim 1 which is N-(p- OTHER REFERENCES chloro-phenylsulfonyD- 2 oxo 5 t -butyl-hexahydro- 5 Reppe et a1.: Leibigs Ann. Jorn. Chemie, vol. 596, azcpine-l-carboxamide. p. 212 (1955).

References Cited HENRY R. JILES, Primary Examiner UNITED STATES PATENTS R. T. BOND, Assistant Examiner 3,063,903 11/1962 Wright. 10 3,105,006 9/1963 Wright.

3,1403 14 7/1964 Muller et a1.

260-3263, 293.74; 424274, 267, 244 3,281,412 10/ 1966 Yale et a1. 

